The 1-second Homer Alaska Elevation Grid provides bathymetric data in ASCII raster format of .89-second resolution in geographic coordinates. This grid is strictly for tsunami inundation modeling
NOAA/PMEL/Center for Tsunami Research (NCTR)
Integrated Models of Coastal Relief at NGDC
NOAA GeoPlatform Entry for Digital Elevation Model Footprints
Digital Elevation Model Footprints ArcGIS Dynamic Map Service
Digital Elevation Model Footprints Web Map Service (WMS)